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# simultaneous equations...

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Manager
Joined: 01 Jun 2006
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simultaneous equations... [#permalink]  16 Dec 2006, 06:47
Q) Dont we have two equations here, one from question stem and the other from statement, the ans should be D...
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Manager
Joined: 01 Jun 2006
Posts: 141
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Kudos [?]: 2 [0], given: 0

E it is
(1)(2) together just help to find the price of 1 dough and 1 cupcake.
Since we have no idea about the total number of Dough and Cup bought, we can't find the numb of Dough bought.
Senior Manager
Joined: 19 Jul 2006
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Re: simultaneous equations... [#permalink]  16 Dec 2006, 19:52
usman7 wrote:
Q) Dont we have two equations here, one from question stem and the other from statement, the ans should be D...

E

question stem says that one kind of dough and one kind cupcake is bought for \$6 ... but it doesn't mention the number of dough and cake , so equation cann't be formed
Director
Joined: 30 Nov 2006
Posts: 591
Location: Kuwait
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Given: XC + YD = 6.00
where X is the price of cupcakes, C is the number of cupcakes
Y is the price of doughnuts and D is the number of doughnuts

(1) 2X = 3Y - 0.1
---------------------
2 equations, 4 unkowns !
statement 1 is insufficient

(2) (X+Y)/2 = 0.35
-----------------------
again, 2 equations, 4 unkowns
statement 2 is insufficient

(1) + (2) together
-----------------------
3 equations, 4 unkowns
insufficient

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